Filtering BGP Updates by Matching the AS_PATH PA

To filter routes by matching the AS_PATH PA, Cisco IOS uses AS_PATH filters. The overall configuration structure is very similar to BGP distribute lists and prefix lists, with the matching logic specified in a list, and the logic being applied with a neighbor command. The main two steps are as follo...

OSPF Design in Light of LSA Types

OSPF

Convergence Times

Another distinguishing characteristic of routing protocols is speed. Convergence times aregenerally grouped as slow or fast. Fast convergence means that the routing protocol is ableto recognize a problem and fix it faster than a user can call to report the problem. Slowprotocols, such as RIP and IGR...

Decimal Numbering System

Every number in the decimal number system can be represented using ten symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. You are familiar with these symbols and how to use them to represent a number. For example, when you see the number 123, you know that it represents one hundred and twenty-three. But wha...

Setting the DSCP or TOS Field

The solution to this problem depends on the sort of traffic distinctions you want to make, as well the version of IOS you are running in your routers. There must be something that defines the different types of traffic that you wish to prioritize. In general, the simpler the distinctions are to ...

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